System and method of iterative image reconstruction for computed tomography

a computed tomography and image reconstruction technology, applied in the field of diagnostic imaging, can solve the problems of large local changes in the conventional statistical weights, slow down the convergence of the iterative optimization algorithm, and image artifacts, and increase the magnitude of image artifacts
US20140369463A1Active Publication Date: 2014-12-18PURDUE RES FOUND INC +2
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
PURDUE RES FOUND INC
Publication Date
2014-12-18

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Abstract

A system and method include acquisition of projection data from a scanned object, the set of projection data comprising a plurality of projection measurements. The system and method also include calculation of a set of modified statistical weights from the projection data, wherein a respective modified statistical weight of the set of modified statistical weights comprises a deviation from an inverse variance of a corresponding projection measurement of the projection data. The system and method further include reconstruction of an image of the scanned object using the set of modified statistical weights as coefficients in an iterative reconstruction algorithm.
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Claims

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